Door-latch.



G. J. MCGUWAN.

DOOR LATCH.

APPLICATION FILED NOM-23,1915.

Patelvlted Aug. 13, 1918.

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mbar/nag G. I. IVICGOWAN.

DOOR LATCH.

APPLICATION FILED N0\l.23, |915. 19275954; Patented Aug.. 13, 191.8.

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UNllTlD STATES @hlhfllQlillo GEORGE MCGWAN, 0F GRAND RAPEBS, MCHGN, ASSGNGR T@ GRAN@ RAPJDS litE'RliG-ERATE, C0., 0F GRAND RA'PXDS, MEECHGAN, A CERATXN F lVGHGil.

DUUR-LATCH.

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Specification of Letters Patent.

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Application led November 23, 19th. serialto. 63,1153.

To all whom t1/tay concern:

Be it known that l, Grenen d. McGowan, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State ot Michigan, have invented new and useful llmprovements in Door-hatches, ot which the following is a specification( 'llhis invention relates to door latches and has for its primary object to provide a de-y vice ot this character having the inherent property of drawing the door into tight engagement with the jamb and at the same time compensating tor any shrinkageof the door with the result that a tight tis had at all times between the door and the jamb which is absolutely necessary in ice bones or similar receptacles.

An object or the invention is to provide novel means tor putting a spring midenl tension the energy oi which when expandu ing being utilized to draw the door into tight engagement with the jamb, this action being facilitated by a hook that. transmits the energy ot the spring to a keeper carn ried by the door.

Another object oit manner of mounting the trigger or hook so that the same may readily hold the spring undertension but when given a slight move-- ment beyond this position the spring will quickly act tor rapidly swinging the hook to a position to rapidly bring the door in close contact with its jamb. v

V7 ith these and other objects in view the invention consists in the construction, combination and arrangement or parts as will be hereinafter moretully described, illustrated yinthe accompanying drawing and pointed out in the claim hereunto apy pended. 1

ln the drawings: `litigare l is a fragmentary portion ot a door and jamb showing my invention applied thereto,

' Fig. 2 is a side elevation of the lock shown applied,

Fig. 3

lig. It 's a side elevation ot the latch with the casing partly in'sections. Figs. 5 and 6 vare horizontal sectional views through the casing. Fig. 7 is a perspective view ot the* hook. Fig. 8 is av perspective view ot the operating lever. i

the invention is the is a vertical sectional line 3-3 ot' as the type having beveled side edges that incorporates with the beveled surfaces ot the j amb,, such construction being well known in the manufacture ot ice bones. Arranged in the jamb l is a casing 3 that forms one element ot my invention. rll`his casing 3 is of a cylindrical shape and has formed integral therewith at an intermediate point a plate extension l provided with openings `fla through which securing elements 6 may be passed so as to secure the casing to the jamb.. Arranged in the cylindrical casing is a coil spring 'l' that at one end bears upon a disk 8 slidably mounted within the casing and adapted to cooperate. with the cam surface 9 of the `hook or'trigger l0. At this point attention is called to the `tact that when the hook is in an inoperative position the cam surface is arranged in alinement with the axis of the spring and the 'axis oit the pivot ll oli the hook with the result that when the hook is in an inoperative position the energy of the spring will be unable to act upon the hook for throwing it about its pivot. The numeral l2 designates the shank oi" the hook while the numeral i3 indicates the bill.. The latter adapted to engage the keeper la andan extension formed on a handle 'l5 that in the initial operation of the latch the keeper or extension it engages the shank tor giving partial rotation to the hook 'tor allowing the torce ot the spring to continuel such, movement for drawing the door into tight engagement with the jamb through the cooperation ofthe bill with the lug lli.

For returning the hook to a position to contract the spring Tl provide a lever iti pivoted upon the plate extension 4 and having its short arm engaging the under surtace or the shank of the hook.. f

From the foregoing description taken in connection with the accompanying drawing the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which consider to be the best embodiment thereor" tdesire to have it understood that the de vice shown is merely illustrative and that such changes may be made When desired as are Within the scope of the claim.

What I claim is ln combination with a door and door jamb therefor, a casing open at its outer end and inserted partially through the jamb, a spring in the casing, a disk positioned against the spring, a trigger pivotally mounted between the sides of said casing at the outer end thereof, said trigger including an inner shanlnand an outer overhanging bill at one side of the pivot therefor and a projecting portion provided With an out-eij cam surface adapted to bear against said disk, a lever pivotally mounted between its ends adjacent said trigger, one end of the lever extending under the shank of the trigger, and a striker connected to the door and adapted to pass across the meeting edges of the door and jamb to thereby engage against the shank of the trigger and turn the same as the door is closed to bring the bill over said striker and hold the same against outward movement, substantially as and for the purposes described.

ln testimony whereof my signature in presence of tivo witnesses.

GEORGE d. MCGWN. Witnesses:

PETER Lnns'rMA,

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